good q! it doesn’t go on a blockchain. it goes into your own personal social data storage (we call it your “repository”), which you’ll be able to take with you if you ever leave bsky.social. it includes all your posts, follows, likes, profile, etc. 🙂

For discussion I refer you to Waldo et al.’s classic “A Note on Distributed Computing”, which is still as true today as it was 30 years ago